Just like grasses on land, seagrasses form vast meadows, produce flowers and seeds, and are home to an incredibly diverse community of organisms. Seagrasses are found around the world, in tropical and colder regions. Shades of green indicate numbers of species reported for an area. (from 2005 UNEP-WCMC).
Mood disorders, or affective disorders, are mental health problems such as depression, bipolar disorder, and mania.Mood disorders can occur in anyone, including children. The cause of mood disorders is not fully understood, but an imbalance in brain chemicals known as neurotransmitters is likely to play a role.ood disorders can also cause an elevated mood (mania) that is accompanied by feelings of grandiosity, extreme energy, and heightened arousal. These feelings are stronger and last longer than normal, and interfere with day-to-day life.
Dysthymic disorder can occur alone or along with other psychiatric or mood disorders. As with depression, dysthymic disorder is more common in women than in men. A family history of mood disorders is not uncommon.This mood disorder tends to appear earlier than major depression, although it can begin anytime from childhood to later in life.Up to 5% of the general population is affected by dysthymic disorder. But its cause is not well understood.his mood disorder is a less severe form of depression. Although less extreme, dysthymic disorder causes chronic of long-lasting moodiness. With dysthymic disorder, low, dark moods invade your life nearly every day for two years or more.